code: def handle_integral(func):
      if func.additive():
          integrand = convert_add(func.additive())
      elif func.frac():
          integrand = convert_frac(func.frac())
      else:
          integrand = 1
  
      int_var = None
      if func.DIFFERENTIAL():
          int_var = get_differential_var(func.DIFFERENTIAL())
      else:
          for sym in integrand.atoms(sympy.Symbol):
              s = str(sym)
              if len(s) > 1 and s[0] == "d":
                  if s[1] == "\\":
                      int_var = sympy.Symbol(s[2:])
                  else:
                      int_var = sympy.Symbol(s[1:])
                  int_sym = sym
          if int_var:
              integrand = integrand.subs(int_sym, 1)
          else:
              # Assume dx by default
              int_var = sympy.Symbol("x")
  
      if func.subexpr():
          if func.subexpr().atom():
              lower = convert_atom(func.subexpr().atom())
          else:
              lower = convert_expr(func.subexpr().expr())
          if func.supexpr().atom():
              upper = convert_atom(func.supexpr().atom())
          else:
              upper = convert_expr(func.supexpr().expr())
          return sympy.Integral(integrand, (int_var, lower, upper))
      else:
          return sympy.Integral(integrand, int_var)
  
imports: from importlib.metadata import version
  import sympy
  from sympy.external import import_module
  from sympy.printing.str import StrPrinter
  from sympy.physics.quantum.state import Bra, Ket
  from .errors import LaTeXParsingError
label_desc: Use image node_id 20 for calling a global function with example usage: handle_integral(func) and returns: sympy, sympy